This link may be helpful:
. http://sdhammika.blogspot.com.au/2009/12/transgendered-people-and-buddhism.htmlTransgendered People And Buddhism by Shravasti Dhammika:
The Tipitaka mentions several different types of transgendered states and individuals – the man-like woman (vepurisika), sexual indistinctness (sambhinna), one having the characteristics of both genders (ubhatovyanjanaka), etc (Vin.III,129). The interesting thing is that such states and individuals are taken for granted in the scriptures with little or no moral judgments being attached to them.
There is also the International Transgender Buddhist SanghaInternational Transgender Buddhist Sangha
Here is a quote from the International Transgender Buddhist Sangha blog:
"The Vinaya Pitaka, the ancient Buddhist texts that define the rules for Buddhist monks and nuns, record two incidences of sex change that a monk and a nun had gone through. A group of monks and nuns bring the two incidences to the Buddha’s notice. The Buddha accepts their changed status. He allows the former male disciple who became a female to live with female disciples, and the former female disciple to live with males.
These episodes indicate the Buddha’s open-mindedness toward transsexual persons. He accepted their bodily changes even though some in his society attributed such changes to the influence of bad Karmas. [...] There is every reason to believe that the Buddha accepted all kinds of people irrespective of any differences they had undergone.
Facebook group of the International Transgender Buddhist Sangha